Spur



FIG. 1 is a front perspective view of the spur.

FIG. 2 is a front view of the spur.

FIG. 3 is a left side view of the spur.

FIG. 4 is a back view of the spur.

FIG. 5 is a right side view of the spur.

FIG. 6 is a top view of the spur; and,

FIG. 7 is a bottom view of the spur.

I claim the ornamental design for a spur, as shown and described.